Phenylalanine & Tyrosine

Specimen:

Test Code

PHETYR

Specimen Name

Phenylalanine & Tyrosine

Collect

1-GreenTop (Na-Heparin, Lithium-Heparin)

Submit

1 mL (Min: 0.5 mL) Plasma Frozen

Special Handling

Transfer plasma to a standard transport tube.

Rejection Criteria

Hemolyzed specimens.

Stability

Ambient Unacceptable; Refrigerated 24 hours; Frozen 1 month

Methodology

Quantitative Liquid Chromatography-Tandem Mass Spectrometry

Performed

Sunday - Saturday

Reported

3-8 days

CPT Codes

  • 82131
  • 84510

Components

Additional Information

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Common Lab Definitions

  • Serum 
  • Plasma 
  • STT